The current generation A8 and Jag XJ have the advantage of the lighter chassis.
Porsche Panamera is still on top when we take into account driving dynamics.
BMW has a good overall presence, a great updated V8 paired with a very good transmission.
The next one (G series 7) will be much lighter and will have much better dynamics than the actual model.
The new S is a luxury cruiser, but the interior styling is somehow wired. At least from my point of view (31yo), for sure the customers of the model are a little bit older than me